4  * SPDX-License-Identifier: Apache-2.0
20 /* Maximum watchdog time is halved due to errata RP2040-E1 */
32 	uint32_t load;  member
43 	const struct wdt_rpi_pico_config *config = dev->config;  in wdt_rpi_pico_setup()
44 	struct wdt_rpi_pico_data *data = dev->data;  in wdt_rpi_pico_setup()
49 		return -ENOTSUP;  in wdt_rpi_pico_setup()
52 	hw_clear_bits(&watchdog_hw->ctrl, WATCHDOG_CTRL_ENABLE_BITS);  in wdt_rpi_pico_setup()
54 	psm_hw->wdsel = 0;  in wdt_rpi_pico_setup()
57 	if (data->reset_type == WDT_FLAG_RESET_SOC) {  in wdt_rpi_pico_setup()
58 		hw_set_bits(&psm_hw->wdsel, PSM_WDSEL_BITS);  in wdt_rpi_pico_setup()
59 	} else if (data->reset_type == WDT_FLAG_RESET_CPU_CORE) {  in wdt_rpi_pico_setup()
60 		hw_set_bits(&psm_hw->wdsel, PSM_WDSEL_PROC0_BITS);  in wdt_rpi_pico_setup()
64 		hw_clear_bits(&watchdog_hw->ctrl,  in wdt_rpi_pico_setup()
68 		hw_set_bits(&watchdog_hw->ctrl,  in wdt_rpi_pico_setup()
73 	watchdog_hw->load = data->load;  in wdt_rpi_pico_setup()
78 	watchdog_hw->scratch[4] = 0;  in wdt_rpi_pico_setup()
79 	watchdog_hw->scratch[5] = 0;  in wdt_rpi_pico_setup()
80 	watchdog_hw->scratch[6] = 0;  in wdt_rpi_pico_setup()
81 	watchdog_hw->scratch[7] = 0;  in wdt_rpi_pico_setup()
83 	hw_set_bits(&watchdog_hw->ctrl, WATCHDOG_CTRL_ENABLE_BITS);  in wdt_rpi_pico_setup()
85 	data->enabled = true;  in wdt_rpi_pico_setup()
87 	err = clock_control_on(config->clk_dev, config->clk_id);  in wdt_rpi_pico_setup()
92 	err = clock_control_get_rate(config->clk_dev, config->clk_id, &ref_clk);  in wdt_rpi_pico_setup()
98 	watchdog_hw->tick = (ref_clk / RPI_PICO_CLK_REF_FREQ_WDT_TICK_DIVISOR) |  in wdt_rpi_pico_setup()
101 	ticks_hw->ticks[TICK_WATCHDOG].cycles = ref_clk / RPI_PICO_CLK_REF_FREQ_WDT_TICK_DIVISOR;  in wdt_rpi_pico_setup()
102 	ticks_hw->ticks[TICK_WATCHDOG].ctrl = TICKS_WATCHDOG_CTRL_ENABLE_BITS;  in wdt_rpi_pico_setup()
110 	struct wdt_rpi_pico_data *data = dev->data;  in wdt_rpi_pico_disable()
112 	if (data->enabled == false) {  in wdt_rpi_pico_disable()
113 		return -EFAULT;  in wdt_rpi_pico_disable()
116 	hw_clear_bits(&watchdog_hw->ctrl, WATCHDOG_CTRL_ENABLE_BITS);  in wdt_rpi_pico_disable()
118 	data->enabled = false;  in wdt_rpi_pico_disable()
125 	struct wdt_rpi_pico_data *data = dev->data;  in wdt_rpi_pico_install_timeout()
127 	if (cfg->window.min != 0U || cfg->window.max == 0U) {  in wdt_rpi_pico_install_timeout()
128 		return -EINVAL;  in wdt_rpi_pico_install_timeout()
129 	} else if (cfg->window.max * USEC_PER_MSEC > RPI_PICO_MAX_WDT_TIME) {  in wdt_rpi_pico_install_timeout()
130 		return -EINVAL;  in wdt_rpi_pico_install_timeout()
131 	} else if (cfg->callback != NULL) {  in wdt_rpi_pico_install_timeout()
132 		return -ENOTSUP;  in wdt_rpi_pico_install_timeout()
133 	} else if ((cfg->flags & WDT_FLAG_RESET_MASK) == WDT_FLAG_RESET_NONE) {  in wdt_rpi_pico_install_timeout()
135 		 * a program counter and stack pointer value to be set,  in wdt_rpi_pico_install_timeout()
138 		return -EINVAL;  in wdt_rpi_pico_install_timeout()
141 	data->load = (cfg->window.max * USEC_PER_MSEC * RPI_PICO_WDT_TIME_MULTIPLICATION_FACTOR);  in wdt_rpi_pico_install_timeout()
142 	data->reset_type = (cfg->flags & WDT_FLAG_RESET_MASK);  in wdt_rpi_pico_install_timeout()
149 	struct wdt_rpi_pico_data *data = dev->data;  in wdt_rpi_pico_feed()
153 		return -EINVAL;  in wdt_rpi_pico_feed()
156 	if (data->enabled == false) {  in wdt_rpi_pico_feed()
158 		return -EINVAL;  in wdt_rpi_pico_feed()
161 	watchdog_hw->load = data->load;  in wdt_rpi_pico_feed()
189 		.load = (CONFIG_WDT_RPI_PICO_INITIAL_TIMEOUT *                                     \